You can't play it alone. Yes, this kind of shit happens here.At the start screen they inform you about the game commands.
The first player can use the joypad and the arrows keys from keyboard (or can play with the keyboard), and the second player plays with keyboard. But the game begins with two players on the screen, there is no option to start on single player mode, and it is very weird.

It's a very, very bad conversion from Arcade
It is like that electric guitar that Gibson released some years ago, that was a replica from a replica, that Slash used to record Gun's n Roses' first album

It was converted from Speccy and because of this we have this shitty colors on the screen. If the problem was only this one, it could be okay. But it's a totally unplayable game, like said by Youtube users.

The whole game is too slow, if you want to play it in a solo mode , you'll need to beat the second player until it's dead twice.The game is very bad and slow , and as I said, it was converted from Speccy, so graphics were reused from another computer when MSX , by itself, were able to produce better graphics and hits are too slow, and animations from the enemies and main character are simply the worst thing that I ever laid eyes on. An eternal piece of shit.
Sincerely, I couldn't stand it five minutes.It's deserves a 'Piece of Shit' Trophy.